API 650 horizontal tank supports for stiffening rings

The API 650 specification provides guidelines for the API 650 horizontal tank design, manufacturing, materials, installation and inspection of welded vertical and cylindrical tanks. Such containers must be on the ground and have a closed or open top.

Strictly control the welding groove forming of API 650 horizontal tank: in order to ensure the geometric dimension of assembly and good welding of welding seam, before hoisting and laying, the edge of all metal vertical storage tank plate shall be polished by grinder, and the flatness of plate shall be ensured according to the design requirements. Strictly control the size of API 650 horizontal tank weld assembly: measures must be taken to strictly control the assembly size of metal vertical tank bottom plate during assembly.

The API 650 horizontal tank outer tank, which is not in contact with the vaporized liquefied gas, may be of single-welded lap or single-welded butt construction when the thickness does not exceed 3/8 in.; at any thickness, the API 620 oil tank outer tank may be of double- welded butt construction without necessarily having full fusion and penetration. Single-welded joints shall be welded from the outside to prevent corrosion and the entrance of moisture.

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Japan is a typical shipping first, and its raw materials are imported from Oceania, central and South America and other Asian countries. Most of the API 650 horizontal tank steel produced is exported to China and other Asian countries, and a small amount is exported to America. Shipping is the main way of its API 650 horizontal tank steel international transportation. According to the data, steel goods account for about 20% of the total sea freight in Japan. The domestic transportation of Japanese steel is mainly truck.